diff --git a/htdocs/ticketsup/tpl/linkedobjectblock.tpl.php b/htdocs/ticketsup/tpl/linkedobjectblock.tpl.php
index cd23471129e..4c1a00c3d82 100644
--- a/htdocs/ticketsup/tpl/linkedobjectblock.tpl.php
+++ b/htdocs/ticketsup/tpl/linkedobjectblock.tpl.php
@@ -16,6 +16,12 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
+// Protection to avoid direct call of template
+if (empty($conf) || ! is_object($conf))
+{
+	print "Error, template page can't be called as URL";
+	exit;
+}
 ?>
 
 <!-- BEGIN PHP TEMPLATE -->
@@ -55,4 +61,4 @@ foreach ($linkedObjectBlock as $object) {
 <?php } ?>
 </table>
 
-<!-- END PHP TEMPLATE -->
\ No newline at end of file
+<!-- END PHP TEMPLATE -->